<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>轮播图点击切换</title>
    <style>
      * {
        box-sizing: border-box;
      }

      .slider {
        width: 560px;
        height: 400px;
        overflow: hidden;
      }

      .slider-wrapper {
        width: 100%;
        height: 320px;
      }

      .slider-wrapper img {
        width: 100%;
        height: 100%;
        display: block;
      }

      .slider-footer {
        height: 80px;
        background-color: rgb(100, 67, 68);
        padding: 12px 12px 0 12px;
        position: relative;
      }

      .slider-footer .toggle {
        position: absolute;
        right: 0;
        top: 12px;
        display: flex;
      }

      .slider-footer .toggle button {
        margin-right: 12px;
        width: 28px;
        height: 28px;
        appearance: none;
        border: none;
        background: rgba(255, 255, 255, 0.1);
        color: #fff;
        border-radius: 4px;
        cursor: pointer;
      }

      .slider-footer .toggle button:hover {
        background: rgba(255, 255, 255, 0.2);
      }

      .slider-footer p {
        margin: 0;
        color: #fff;
        font-size: 18px;
        margin-bottom: 10px;
      }

      .slider-indicator {
        margin: 0;
        padding: 0;
        list-style: none;
        display: flex;
        align-items: center;
      }

      .slider-indicator li {
        width: 8px;
        height: 8px;
        margin: 4px;
        border-radius: 50%;
        background: #fff;
        opacity: 0.4;
        cursor: pointer;
      }

      .slider-indicator li.active {
        width: 12px;
        height: 12px;
        opacity: 1;
      }
    </style>
  </head>

  <body>
    <div class="slider">
      <div class="slider-wrapper">
        <img src="./images/slider01.jpg" alt="" />
      </div>
      <div class="slider-footer">
        <p>对人类来说会不会太超前了？</p>
        <ul class="slider-indicator">
          <li class="active"></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
          <li></li>
        </ul>
        <div class="toggle">
          <button class="prev">&lt;</button>
          <button class="next">&gt;</button>
        </div>
      </div>
    </div>
    <script>
      // 1. 初始数据
      const sliderData = [
        {
          url: "./images/slider01.jpg",
          title: "对人类来说会不会太超前了？",
          color: "rgb(100, 67, 68)",
        },
        {
          url: "./images/slider02.jpg",
          title: "开启剑与雪的黑暗传说！",
          color: "rgb(43, 35, 26)",
        },
        {
          url: "./images/slider03.jpg",
          title: "八年游戏策划缝的游戏啥样。",
          color: "rgb(36, 31, 33)",
        },
        {
          url: "./images/slider04.jpg",
          title: "真正的jo厨出现了！",
          color: "rgb(139, 98, 66)",
        },
        {
          url: "./images/slider05.jpg",
          title: "李玉刚：让世界通过B站看到东方大国文化",
          color: "rgb(67, 90, 92)",
        },
        {
          url: "./images/slider06.jpg",
          title: "快来分享你的寒假日常吧~",
          color: "rgb(166, 131, 143)",
        },
        {
          url: "./images/slider07.jpg",
          title: "哔哩哔哩小年YEAH",
          color: "rgb(53, 29, 25)",
        },
        {
          url: "./images/slider08.jpg",
          title: "站式解决你的电脑配置问题！！！",
          color: "rgb(99, 72, 114)",
        },
      ];

      let i = 0;

      // 获取元素
      let img = document.querySelector(".slider-wrapper img");
      let p = document.querySelector(".slider-footer p");
      let footer = document.querySelector(".slider-footer");
      // 获取右按钮
      let next = document.querySelector(".next");
      // 点击事件
      next.addEventListener("click", function () {
        i++;
        // 判断条件 大于8 归零
        if (i >= sliderData.length) {
          i = 0;
        }

        // 渲染对应数据
        img.src = sliderData[i].url;
        p.innerHTML = sliderData[i].title;
        footer.style.backgroundColor = sliderData[i].color;
        // 渲染对应圆点
        document
          .querySelector(".slider-indicator .active")
          .classList.remove("active");
        document
          .querySelector(`.slider-indicator li:nth-child(${i + 1})`)
          .classList.add("active");
      });
      // 获取左按钮
      let prev = document.querySelector(".prev");
      prev.addEventListener("click", function () {
        i--;
        // 判断条件 大于8 归零
        if (i < 0) {
          i = 7;
        }

        // 渲染对应数据
        img.src = sliderData[i].url;
        p.innerHTML = sliderData[i].title;
        footer.style.backgroundColor = sliderData[i].color;
        // 渲染对应圆点
        document
          .querySelector(".slider-indicator .active")
          .classList.remove("active");
        document
          .querySelector(`.slider-indicator li:nth-child(${i + 1})`)
          .classList.add("active");
      });
      setInterval(function () {
        if (i >= sliderData.length) {
          i = 0;
        }
        i++;

        // 更新图片和文字
        img.src = sliderData[i].url;
        p.innerHTML = sliderData[i].title;

        // 选择器修正，更新小圆点状态
        let liList = document.querySelectorAll(".slider-indicator li");
        liList.forEach(function (li) {
          li.classList.remove("active");
        });
        liList[i].classList.add("active");
      }, 1000);
    </script>
  </body>
</html>
